2018.24.1

This update has a big improvement in traffic jams, but also some minor improvements on local roads. And unfortunately also a regression in sharper turns.

I received 2018.24.1 last week, and I gave it a workout on my usual torture courses. It seems to be essentially the same as 2018.21.9 in road performance. The vehicle under AP still pulls into on-ramps, and wrong-side-of-the-road AP still works. The AP prompt delays averaged 49 seconds...